Month: May 2016
![Control an electrical appliance with your smartphone – WiFi Control an electrical appliance with your smartphone – WiFi](https://www.electronics-lab.com/wp-content/uploads/2016/05/FVDJD1YINYTZSEW.MEDIUM.jpg)
Control an electrical appliance with your smartphone – WiFi
Ruben Marc Speybrouck show us how to control a device using your tablet or smartphone. To achieve that he used arduino, blynk and a wemos / ESP8266 board. In this tutorial we will be making something I call a wifi controlled ac switch. (But iy also works for DC applications that are...
Continue Reading![Graphene Patterned at Room Temp Graphene Patterned at Room Temp](https://www.electronics-lab.com/wp-content/uploads/2016/05/rcj_One-Step_Graphene_1.png)
Graphene Patterned at Room Temp
by R. Colin Johnson @ eetimes.com LAKE WALES Fla.—Graphene is easily grown with chemical vapor deposition (CVD) on copper foil, but a simple way of etching out the necessary circuit patterns and transferring them to a non-metallic substrate has eluded engineers. Now researchers at...
Continue Reading![T-baneklokke – A Coundown clock T-baneklokke – A Coundown clock](https://www.electronics-lab.com/wp-content/uploads/2016/05/IMG_6338-600.jpg)
T-baneklokke – A Coundown clock
Joakim made a coundown clock for his wife and documented the whole process on his blog: The clock is built using an Arduino, and has a battery powered real time clock to remember the time while powered off. To make it truly stand alone I added the possibility to set the time and...
Continue Reading![DIY electronic RFID Door Lock with Battery Backup DIY electronic RFID Door Lock with Battery Backup](https://www.electronics-lab.com/wp-content/uploads/2016/05/Mainboard.jpg)
DIY electronic RFID Door Lock with Battery Backup
Elmue build a RFID electronic door lock using PN532 Controller, Vehicle Battery and Teensy 3.2 board. The advantage of an electronic door lock is that the above security issues do not apply. It is much better to have a safe door lock which prevents that the thief can enter than to...
Continue Reading![Reverse engineering the popular 555 timer chip (CMOS version) Reverse engineering the popular 555 timer chip (CMOS version)](https://www.electronics-lab.com/wp-content/uploads/2016/05/blocks-e1462516490459.jpg)
Reverse engineering the popular 555 timer chip (CMOS version)
Ken Shirriff reverse engineer the CMOS version of 555 timer IC and explains how it works. This article explains how the LMC555 timer chip works, from the tiny transistors and resistors on the silicon chip, to the functional units such as comparators and current mirrors that make it...
Continue Reading![6 Digit Serial Display Driver with CAT4016 6 Digit Serial Display Driver with CAT4016](https://www.electronics-lab.com/wp-content/uploads/2016/05/6-Digit-Serial-Display-Driver-CAT4016-C096B-500x500-e1462442946636.jpg)
6 Digit Serial Display Driver with CAT4016
6 Digit serial display project has been designed around CAT4016 IC from ON semi. The CAT4016 is a 16 channel constant current driver for LED billboard and other general display applications. LED channel currents are programmed together via an external RSET resistor. Low output voltage...
Continue Reading![ACS730 – Hall-effect current sensor with 1MHz bandwidth ACS730 – Hall-effect current sensor with 1MHz bandwidth](https://www.electronics-lab.com/wp-content/uploads/2016/05/2016-05-02-eete-jh-allegro.jpg)
ACS730 – Hall-effect current sensor with 1MHz bandwidth
Allegro MicroSystems has released its first ever 1MHz bandwidth Hall-effect current sensor IC, boasting a 210ns response time. The ACS730 provides an economical and precise solution for AC or DC current sensing and is aimed at industrial, commercial, and communications systems for...
Continue Reading![Fluke/Philips PM66xx Frequency Counter OCXO Upgrade Fluke/Philips PM66xx Frequency Counter OCXO Upgrade](https://www.electronics-lab.com/wp-content/uploads/2016/05/pm6674_ocxoupg_revb-e1462431903898.jpg)
Fluke/Philips PM66xx Frequency Counter OCXO Upgrade
In this post Dan Watson documents an OCXO upgrade board he designed for the Fluke/Philips PM66xx line of frequency counters. A few months ago I purchased a Philips PM6674 frequency counter on eBay. It's an older 9 digit counter with two channels that has a maximum input frequency of...
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